Configurable two-wire interface module

Abstract

A telecommunications system and constituent two-wire interface module. The two wire interface module includes a logic component configured to communicate over the same pair of wires using different two-wire interface protocols depending on an input signal presented on a configuration input. This configurability allows the two-wire interface module to use the same two wires to communicate with a variety of other two-wire interface modules, even if those two-wire interface modules communicate using different two-wire interface protocols.

1. An optical transceiver, the optical transceiver including:
 a laser driver; 
 a post-amplifier; and 
 a digital core component, wherein the digital core component includes:
 a register array component, wherein the register array component is configured to store one or more control values which control the laser driver and post-amplifier; 
 a slave component, wherein the slave component is configured to read data from and write data to the register array component; and 
 a boot component, wherein the boot component includes:
 a two-wire interface module, the two-wire interface module including:
 a first two-wire interface, wherein the first two-wire interface is configured to transmit data to and receive data from the slave component; and 
 wherein the first two-wire interface includes: 
  a first interface wire; and 
  a second interface wire; 
 a second two-wire interface, wherein the second two-wire interface is configured to transmit data to and receive data from an external control source; and 
 wherein the second two-wire interface includes: 
  a third interface wire; and 
  a fourth interface wire; 
 a configuration input; and 
 a logic component configured to: 
  communicate over the first two-wire interface with the slave component using a first two-wire interface protocol; 
  communicate over the second two-wire interface using a first two-wire interface protocol when the configuration input receives a first input signal correlating to the first two-wire interface protocol; 
  communicate over the second two-wire interface using the second two-wire interface protocol when the configuration input receives a second input signal correlating to the second two-wire interface protocol, 
 
 wherein the slave component includes a FSB slave component and the first two-wire interface protocol includes the Finisar Serial Bus (FSB) two-wire interface protocol and the Finisar Serial Bus (FSB) two-wire interface protocol includes:
 a preamble field; 
 a frame start field; 
 an operation field; 
 a device identifier field; 
 a basic address field; 
 a first bus turnaround field; 
 a data field; 
 a second bus turnaround field; and 
 a frame end field. 
 
 
 
 
   
   
     2. An optical transceiver in accordance with  claim 1 , wherein the Finisar Serial Bus (FSB) two-wire interface protocol further includes:
 an extended field; 
 an bus hold field; 
 an cyclic redundancy checking field; 
 an acknowledgement field; and 
 an error status field. 
 
   
   
     3. An optical transceiver in accordance with  claim 1 , wherein the logic component includes a master component, wherein the master component is configured to communicate with the slave component over the first two-wire interface module and wherein:
 the first wire is configured to transmit a clock signal; and 
 the second wire is configured to transmit a data signal.